The ECA1575P20B100A from ECHO Microwave is a Band Pass Filter with Frequency 1.57 to 1.59 GHz, Insertion Loss 1 dB, Rejection 100 dB @ 1495.42 MHz, Ripple 0.8 dB, Return Loss 20 dB. Tags: Cavity Filter. More details for ECA1575P20B100A can be seen below.